Pascal Chabert
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View article: Iodine plasmas for space propulsion and industrial applications
Iodine plasmas for space propulsion and industrial applications Open
With as many as 2000 satellites per year forecast to be launched over the next decade, onboard propulsion systems will become increasingly important for ensuring both mission success and a sustainable space environment. Plasma-based electr…
View article: Steady-state plasma model of an iodine-fueled Hall thruster
Steady-state plasma model of an iodine-fueled Hall thruster Open
A time-independent, one-dimensional plasma model is proposed and used to investigate the characteristics and performance of iodine-fueled Hall thrusters. The model accounts for radial plasma-wall losses and includes major iodine collisiona…
View article: Refining the modeling strategy for anomalous electron transport in fluid simulations of Hall thrusters via insights from PIC simulations
Refining the modeling strategy for anomalous electron transport in fluid simulations of Hall thrusters via insights from PIC simulations Open
Modeling anomalous transport in fluid simulations is a fundamental challenge for developing efficient and robust fluid simulation tools for Hall thrusters. This paper investigates optimal strategies for modeling anomalous transport in such…
View article: Similarity parameters and scaling laws for Hall thrusters
Similarity parameters and scaling laws for Hall thrusters Open
Hall thrusters are one of the most successful and dominant electric propulsion technologies to date, and with constantly evolving space mission needs, there is continual interest in expanding operational envelopes to different power levels…
View article: Analysis and control of Hall effect thruster using optical emission spectroscopy and artificial neural network
Analysis and control of Hall effect thruster using optical emission spectroscopy and artificial neural network Open
This study presents a proof-of-principle for using optical emission spectroscopy and artificial neural networks for real-time monitoring and control of the operational parameters of a Hall effect thruster: the anode voltage, the anode xeno…
View article: Analytical model of a Hall thruster
Analytical model of a Hall thruster Open
Hall thrusters are one of the most successful and prevalent electric propulsion systems for spacecraft in use today. However, they are also complex devices and their unique E×B configuration makes modeling of the underlying plasma discharg…
View article: Strategies for enhanced accuracy in 1D fluid simulation of Hall thruster IEPC-2024-377
Strategies for enhanced accuracy in 1D fluid simulation of Hall thruster IEPC-2024-377 Open
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View article: Investigation of the directional Faraday cup and improvement of the comparison between direct and indirect thrust measurements of a magnetic nozzle ECR thruster
Investigation of the directional Faraday cup and improvement of the comparison between direct and indirect thrust measurements of a magnetic nozzle ECR thruster Open
The thrust of an electric propulsion device estimated from electrostatic probe measurements may be different from direct thrust measurements. In order to reduce this discrepancy for electron cyclotron resonance thrusters (ECRT), a new diag…
View article: Study of the breathing mode development in Hall thrusters using hybrid simulations
Study of the breathing mode development in Hall thrusters using hybrid simulations Open
We use a 2.5D hybrid simulation to study the breathing mode (BM) dynamics in Hall thrusters (HTs). This involves a 1D Euler fluid simulation for neutral dynamics in the axial direction, coupled with a 2D axial–azimuthal Particle-in-Cell (P…
View article: Measurement of the main neutral species densities and temperatures in iodine plasmas using optical absorption techniques
Measurement of the main neutral species densities and temperatures in iodine plasmas using optical absorption techniques Open
Iodine is a promising propellant for future plasma thrusters used in space propulsion. It is therefore important to understand the basic physics and chemistry of low-pressure iodine plasmas. In the present work, optical absorption methods …
View article: Discussion on the transport processes in electrons with non-Maxwellian energy distribution function in partially-ionized plasmas
Discussion on the transport processes in electrons with non-Maxwellian energy distribution function in partially-ionized plasmas Open
In a previous work (Alvarez Laguna et al 2022 Phys. Plasmas 29 083507), we have developed a non-linear moment model for electrons that self-consistently captures non-Maxwellian electron energy distribution function effects. The model does …
View article: Planetary Exploration Horizon 2061 Report Chapter 5: Enabling technologies for planetary exploration
Planetary Exploration Horizon 2061 Report Chapter 5: Enabling technologies for planetary exploration Open
The main objective of this chapter is to present an overview of the different areas of key technologies that will be needed to fly the technically most challenging of the representative missions identified in chapter 4 (the Pillar 2 Horizo…
View article: Two-photon absorption laser induced fluorescence (TALIF) detection of atomic iodine in low-temperature plasmas and a revision of the energy levels of I I
Two-photon absorption laser induced fluorescence (TALIF) detection of atomic iodine in low-temperature plasmas and a revision of the energy levels of I I Open
In order to perfect the use of iodine, instead of xenon, in plasma thrusters, an experiment has been set up to investigate the feasibility of two-photon absorption laser induced fluorescence (TALIF) diagnostics in iodine plasmas. Levels …
View article: Two-dimensional effects on electrostatic instabilities in Hall thrusters. II. Comparison of particle-in-cell simulation results with linear theory dispersion relations
Two-dimensional effects on electrostatic instabilities in Hall thrusters. II. Comparison of particle-in-cell simulation results with linear theory dispersion relations Open
In Paper I, we successfully used an external circuit to significantly damp the Breathing Mode (BM) oscillations in 2D particle-in-cell self-consistent simulations of the axial–azimuthal plane of a Hall thruster. We also introduced the two-…
View article: Two-dimensional effects on electrostatic instabilities in Hall thrusters. I. Insights from particle-in-cell simulations and two-point power spectral density reconstruction techniques
Two-dimensional effects on electrostatic instabilities in Hall thrusters. I. Insights from particle-in-cell simulations and two-point power spectral density reconstruction techniques Open
Using 2D particle-in-cell (PIC) simulations coupled to a fluid description of the gas dynamics, we study the electrostatic instabilities developing in the axial–azimuthal plane of a Hall thruster, during several periods of a low-frequency …
View article: Foundations of magnetized radio-frequency discharges
Foundations of magnetized radio-frequency discharges Open
This is the second part of a set of two papers on radio-frequency (RF) discharges, part of a larger series on the foundations of plasma and discharge physics. In the first paper (Chabert et al 2021 Plasma Sources Sci. Technol. 30 024001) t…
View article: A regularized high-order moment model to capture non-Maxwellian electron energy distribution function effects in partially ionized plasmas
A regularized high-order moment model to capture non-Maxwellian electron energy distribution function effects in partially ionized plasmas Open
A model for electrons in partially ionized plasmas that self-consistently captures non-Maxwellian electron energy distribution function (EEDF) effects is presented. The model is based on the solution of scalar and vectorial velocity moment…
View article: Charged-particles measurements in low-pressure iodine plasmas used for electric propulsion
Charged-particles measurements in low-pressure iodine plasmas used for electric propulsion Open
This paper investigates iodine as an alternative propellant for space plasma propulsion. Measurements are taken in a low-pressure inductively-coupled plasma chamber used as the ionization stage of a gridded ion-engine. Langmuir probes are …
View article: Analysis of small scale fluctuations in Hall effect thrusters using virtual Thomson scattering on PIC simulations
Analysis of small scale fluctuations in Hall effect thrusters using virtual Thomson scattering on PIC simulations Open
Hall effect thrusters are yet not fully understood due to multiple open questions, among which the anomalous electron transport is the most challenging. Particle-In-Cell (PIC) simulations suggested that electron transport is strongly affec…
View article: The origin of the breathing mode in Hall thrusters and its stabilization
The origin of the breathing mode in Hall thrusters and its stabilization Open
Using both 0D and 1D fluid models, we revisit the formation of the breathing mode in Hall thrusters and show that it is an ionization instability associated with nonlinearity in the electron power absorption. As the plasma density increase…
View article: 2D radial-azimuthal particle-in-cell benchmark for <b>E</b> <b>×</b> <b>B</b> discharges
2D radial-azimuthal particle-in-cell benchmark for <b>E</b> <b>×</b> <b>B</b> discharges Open
In this paper we propose a representative simulation test-case of E × B discharges accounting for plasma wall interactions with the presence of both the electron cyclotron drift instability and the modified-two-stream-instability. Seven in…
View article: The interaction between ion transit-time and electron drift instabilities and their effect on anomalous electron transport in Hall thrusters
The interaction between ion transit-time and electron drift instabilities and their effect on anomalous electron transport in Hall thrusters Open
Recent simulations and experiments have observed a transition from short to long-wavelength azimuthal instabilities that leads to enhanced electron transport in Hall thrusters. Here we make the hypothesis that this phenomenon stems directl…
View article: Conditions of appearance and dynamics of the modified two-stream instability in E × B discharges
Conditions of appearance and dynamics of the modified two-stream instability in E × B discharges Open
The large differential drift motion between electrons and ions that is created by the E × B current can produce different instabilities, such as the electron cyclotron drift instability, perpendicular to the magnetic field, and the Modifie…
View article: Perspectives on Physics of E×B Discharges Relevant toPlasma Propulsion and Similar Technologies
Perspectives on Physics of E×B Discharges Relevant toPlasma Propulsion and Similar Technologies Open
View article: A comparison between kinetic theory and particle-in-cell simulations of anomalous electron transport in E×B plasma discharges
A comparison between kinetic theory and particle-in-cell simulations of anomalous electron transport in E×B plasma discharges Open
Understanding anomalous electron transport in E×B discharges remains a key challenge in the development of self-consistent models of these systems. It has been shown that short-wavelength, high-frequency instabilities in the azimuthal E×B …
View article: Fast Camera Analysis of Plasma Instabilities in Hall Effect Thrusters Using a POD Method under Different Operating Regimes
Fast Camera Analysis of Plasma Instabilities in Hall Effect Thrusters Using a POD Method under Different Operating Regimes Open
Even after half a century of development, many phenomena in Hall Effect Thrusters are still not well-understood. While numerical studies are now widely used to study this highly non-linear system, experimental diagnostics are needed to val…
View article: Corrigendum: Non-isothermal sheath model for low pressure plasmas (2019 Plasma Sources Sci. Technol. 28 075007)
Corrigendum: Non-isothermal sheath model for low pressure plasmas (2019 Plasma Sources Sci. Technol. 28 075007) Open
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View article: Particle-in-cell simulations and passive bulk model of collisional capacitive discharge
Particle-in-cell simulations and passive bulk model of collisional capacitive discharge Open
Intermediate pressure (0.2–6.0 Torr), radio frequency capacitive discharges are of increasing importance in the thin film processing industry. However, existing low pressure (<0.1Torr) discharge models are often used beyond their applic…
View article: Pattern Formation in Low-Pressure Radio-Frequency Plasmas due to a Transport Instability
Pattern Formation in Low-Pressure Radio-Frequency Plasmas due to a Transport Instability Open
Pattern formation, observed experimentally in a radio-frequency plasma in annular geometry, and characterized by azimuthal symmetry breaking of the plasma parameters, is reported. The azimuthal modulation increases with increasing pressure…
View article: Plasma-sheath transition in multi-fluid models with inertial terms under low pressure conditions: Comparison with the classical and kinetic theory
Plasma-sheath transition in multi-fluid models with inertial terms under low pressure conditions: Comparison with the classical and kinetic theory Open
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